Windows: crash in Pango > Font Features demo
It crashes with a failed assertion:
(gtk3-demo.exe:18380): Pango-CRITICAL **: 21:06:02.770: pango_fc_font_lock_face: assertion 'PANGO_IS_FC_FONT (font)' failed
Segmentation fault
So it assumes FC fonts. Of course it runs fine when launching gtk3-demo
with the PANGOCAIRO_BACKEND=fc
environment variable.